Drupal (pronounced /ˈdruː-pʌl/) is a free and open source^[1] modular framework and Content Management System (CMS) written in the programming language PHP.^[2][3] It is used as a "back end" system for many different types of Web sites, ranging from small personal blogs to large corporate and political sites.^[4]

The standard release of Drupal, known as "Drupal core", contains basic features common to most CMSs. These include the ability to register and maintain individual user accounts, administration menus, RSS-feeds, customizable layout, flexible account privileges, logging, a blogging system, an Internet forum, and options to create a classic "brochureware" Web site or an interactive community Web site.

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